Drive mechanism.



. DE SCHAUM.

DRIVE MEGHANISM.

APPLIUATIQN funn AUG. 3o, 191s.

Patented June 9, 1914,

\ l I l Wirf c3555' COLUMBIA PLANUQRAPH co.,wASM|NrON. u. D.

WILLIAM LAMDE SCHAUM, OF DETROIT. MICHIGAN.

DRIVE MECHANISM.

Specification ofy Letters Patent.

:Entented June i), 191 4.

Application filed August 30, 1913. Serial No. 787,541.

T0 all 'lli/1.0m it muy concern Be it known that l., l/Vinniaiw A. Diehcnanar, a citizen of the United States of .\merica, residingat Detroit,in the county of lVayne and State of Michigan, have invented certain newand useful Improvements in Drive Mechanism, of which the following is aspecification, reference being` had therein to the accompanyingdrawings.

My invention relates to drive mechanisms and more particularly to adrive mechanism of the friction typein which are two or more spacedmembers that are adapted to be driven the one from another by aninterimaliale transmission. i lVith this type of drive mechanism, asthere is an uneven wear between the engaging faces of the spaced membersand the transmission, when the parts become worn there is a tendency7 toavoid proper friction contact between the transmission and the frictionmembers being made.

My invention has among the objects thereof to provide a construction inwhich proper friction contact is maintained between the various parts ofthe drive mechanism, irrespective of the unequal wear upon the severalfriction members.

Also among the objects of the invention is to provide aeorstruction inwhich a di-` rect drive may be obtained between the drive and drivenmembers and which will permit changing from an intermediate speed to thedirect drive without a sudden gripping of the parts.

Other objects of the invention will more fully hereinafter appear.

To this end the invention resides in the peculiar construction,arrangement and combination of parts as hereinafter set forth and asparticularly pointed out in the claims.

In the drawings,-Figure 1 is a side ele vation of the transmissionmechanism embodying the invention; and Fig. 2 illustrates certaindetails of construction.

l'n the embodiment of my invention shown .in the drawings A designatesthe drive shaft and B the driven shaft, journaled in any suitablebearings to independently rotate. Fixed to the shaft A is a frictionmember C, while connected to the shaft B to rotate therewith, butlongitudinally adjustable thereupon, is a friction member D. The latteris driven from the member C by a suitable transmission E. The frictionmembers C D are illustrated as comprising disks having the pcrij'iheriesthereof of suitable friction material F. while the transl'nission E isin the form of a disk provided with a comparatively flat bearing face Gwith which the peripheries of the members C D `are adapted tofrietionally engage. The disk ll is mounted upon a shaft H journalcd ina bearing l but longitudinally adjustable therein toward and from. thefriction members (l D in the usual manner.

Ihe friction periphery of the member D is subjected to greater wear thanthe bear ing face of the member (l, due to shifting of the friction diskD to effect a change of speed or the like. and if the Ishafts and l werein alinement and the axes of the members l) and lll were fixed inrelation to each other, when the friction surface of the shiftablemember became worn the member C would prevent proper driving contactbcing made between the transmission disks and the member D, especiallyon direct drive. Thus it will be readily apparent upon reference to thedrawing that if thc disk ll was, for instai'lec, in the position shownin dotted lines in Fig. l and the friction surface thereof was worn sothat the diameter of the member D was less than that of the disk (l, thelatter would prevent the transmission disk E from properly engaging thefriction surface of the shii'table dislnproviding the shafts A and lwere in alinement and the member ll rotated about a fixed axis.

With myl improved constrlu'tion l so mrunl the friction disks as toprovide a relative yielding thereof. ln the structure illustrated theshaft A to which the member C isconnected is journaled in a suitablebcaringd which is movably connected to a support K by bolts L which passthrough elongated openings M in the attaching portion N of the bearingJ.

O is a spring arranged within a housing P and acting against one end ofthe attaching section N to form a yielding abutment therefor when thebearing is moved in a direction away from the disk E. Tension of thisspring` may be regulated by means of a set-screw (l and a loclrnut R.

The parts are so adjusted that normally the spring O will retain thebearing J at a position in which the shafts A and B are alined, but ifthe member E is moved toward the disks C and D, the transmission diskengages the bearing surface of the member g' V f 1,099,239

tive movement of thedisks G and D transversely Vof their axes, othermeans may be employed for accomplishing this result, and I do notconsider my protection limited to the structure shown, or as beingapplicable merely to the specific drive mechanism of the drawings. f

The inner faces S T of the disks C and D are provided with cooperatingclutch teeth U V, and by shifting the disks D longitudinally of theshaft B until the clutch teeth engage, a direct drive will be effectedbetween the drive and driven shafts. In order to permit of thecooperating clutch parts to be engaged without a sudden jerk or jar uponthe transmission, I form the disk E of a larger diameter than the driveand driven members. Therefore, when the disks C and D are in thepositio-n shown in dotted lines lin Fig. l, their peripheral speed willbe substantially the same, eliminating the sudden jar which would beeffected if the drive and driven members were coupled together uponrotating at considerably diiferent speeds. Upon the engaging of thecooperating clutch teeth the transmission disk E is moved out ofengagement with the drive and driven disks, any suitable shifting`mechanisms beingy employed for actuating the disks D and C.

What I claim as my invention is l. In a friction drive mechanism, thecombination with drive and driven frictionmembers, of a, transmissionmember adapted to engage said members and forming the driving connectiontherebetween, one of said friction members being yieldable independentlyof the other, in a plane transverse to the axis of the yieldabilefriction member.

2. In a friction drive mechanism, the combination with a drive and a`driven friction Copies of this patent may be obtained for ve cents each,by addressing the Commissioner of Patents,v

member, of a transmission member adapted to engage said members andforming the driving connection therebetween, and a bearing for one ofsaid friction members yieldable in a plane transverse to the axisthereof.

3. Ina friction drive mechanism, the combination with drive and drivenshafts, of a friction member secured to each of said shafts, atransmission disk forming the driv ing connection between said frictionmeme bers, anda bearing for one of said shaft-s yieldable in a planetransverse to the axis thereof( 4:. In a friction drive mechanism, thecombination with a drive and drivenv membersl having frictionperipheries, of a transmission disk having a driving surface adapted toengage the peripheries of the drive and driven members, one of saidmembers being adapted to be shifted across the bearing surface of thetransmission disk, and a bea-ring forthe other member yieldab-le in aplane Y transverse to the afXis thereof. Y

5. In a friction drive mechanism, they combination'with a drive and adriven member Vhaving friction peripheries, of a transmission diskadapted to be adjusted into and out yof engagement with said members andhaving affrictionsurfa'ce adapted to engage 'the peripheries of thedrive and driven members, and a bearing for one of said meinberspermitting the adj ustnient of said member by and lin theV direction ofmovement of said friction disk. Y

6. In a friction drive mechanism, the combination with a drive and adriven friction member, of a transmission member adapted to engage said'friction members and forming the driving y connection therebetween, abearing for one of saidmembers, yieldable in a plane transverse to theaxis of move-k ment of said friction member, and means for regulatingthe pressure required for effecting a yielding of said bearing.

In testimony whereof I afix my signature in presence of two witnesses. yWILLIAM A. DE SCHAUM. Witnesses:

WM. J. BELKNAP, JAMES P. BARRY.

Washington, D. C.

